Fix OLE Version Mismatch 0x80010110 in COM+ Apps

Quick Fix (30 seconds) — Restart the Component Services

Before you dig into registry or reinstalls, try this. The OLE version error shows up when a COM+ application is stuck in a weird state. What's actually happening here is the COM+ runtime cache is holding a reference to an old OLE interface that conflicts with what the client expects. Just restarting Component Services clears that cache and often resolves it.

1. Open Component Services — press Win+R, type comexp.msc, hit Enter.
2. In the left pane, expand Component Services > Computers > My Computer.
3. Right-click COM+ Applications and select Stop. Wait 5 seconds.
4. Right-click COM+ Applications again and select Start.
5. Try your app again.

If the error goes away, you're done. If not, move to the next step. This works maybe 30% of the time, but it's free and fast.

Moderate Fix (5 minutes) — Re-register OLE Core DLLs

The reason step 1 fails sometimes is the problem is deeper — the OLE DLLs themselves got corrupted or have version mismatches between their stored metadata and the actual file versions. Re-registering them forces Windows to rebuild the OLE registration database. I've seen this fix it on Server 2012 R2 and Windows 10 22H2.

1. Open an Administrator Command Prompt — right-click Start > Windows Terminal (Admin) or cmd.exe as admin.
2. Run these three commands one by one, waiting for each to say "succeeded":

   regsvr32 /i ole32.dll
   regsvr32 /i oleaut32.dll
   regsvr32 /i olepro32.dll

3. Reboot your machine — don't skip this, the changes won't take effect until the OLE runtime reloads.
4. Test your app.

What's actually happening here is /i flag tells regsvr32 to run the DLL's install entry point, not just register the COM classes. This re-installs OLE's registry keys like HKEY_CLASSES_ROOT\Interface entries. If you don't see "succeeded" for any DLL, that file might be missing or corrupted — you'll need the advanced fix.

Advanced Fix (15+ minutes) — Manual Registry Check and Repair

If you're still seeing 0x80010110, the problem is likely a specific version mismatch in the registry. The error code RPC_E_VERSION_MISMATCH fires when the OLE runtime checks the version number on the server's interface proxy and finds it different from what the client's stub expects. This can happen after a partial Windows update, or if you copied application files from a different OS version.

Step 1 — Check the OLE Version Registry Key

Open Regedit and go to:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OLE

Look for the value OleVersion (REG_SZ). On a normal Windows 10/Server 2019 system, this should be 2.40. On Windows 11 or Server 2022, it might be 2.50. Write down what you see — we'll compare it later.

Step 2 — Find the Offending App's Component

The error message usually tells you the COM+ application name. If not, check the Application event log under Windows Logs > Application. Look for an event with source "COM" or "OLE" and ID 1000, 1001, or 7031. It'll say something like "The server {GUID} did not register with DCOM within the required timeout..."

Once you have the GUID or app name, search the registry for it. For example, for a COM+ app called "MyApp":

HKEY_CLASSES_ROOT\CLSID\{app-guid}\ProgID

This tells you the app's CLSID.

Step 3 — Check the Proxy/Stub Version

For each interface used by the app, the registry stores version info under:

HKEY_CLASSES_ROOT\Interface\{interface-guid}\ProxyStubClsid32

Look at the default value — it should point to a CLSID that has a Version value. Compare that version with the one in the OLE registry key. If they don't match (e.g., OLE says 2.40 but the interface says 2.50), you found the mismatch.

To fix, you can either:

• Change the interface version to match the OLE version (backup the original first!), or
• Delete the interface key and let the app re-register it on next start. I prefer the second option because it forces a clean registration.

Right-click the interface key and delete it. Then restart your app or the Component Services service.

Step 4 — Last Resort: System File Checker and DISM

If multiple interfaces have wrong versions or you can't identify the culprit, the OLE core files might be corrupted. Run these from an admin command prompt:

sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

SFC fixes corrupted files. DISM fixes the component store those files come from. Reboot after both finish, then re-do the moderate fix (re-register DLLs). This is heavy but has saved me twice on a Server 2016 box that ate a bad update.

One last thing — if this error happens in a virtualized environment (Hyper-V, VMware), check that the VM's integration services are up to date. Outdated integration services can cause version mismatches in the OLE transport layer. I wasted 3 hours once before realizing the host tools were from 2019 but the guest was from 2022.

That's it. Start with the quick restart, go through the DLL re-registration, and only hit the registry if you have to. Most people stop at step 2. If you got here and it's still broken, you might need to update or reinstall the specific COM+ application — that's a vendor issue at that point.